Q: Service Emissions System light is on

asked by on

My Service Emissions System light is on.

A: The most common cause of the service emissi...

The most common cause of the service emissions light coming on is an EVAP (gas vapor) leak. The first place to look for an EVAP leak is the gas cap - especially if you have just gotten fuel. A qualified technician, like one from YourMechanic, will be able to inspect your Service Emission System light and repair any issues you may be having with your car.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Changed alternator and battery, but still says check charging system

Hello and thank you for writing in! This is likely a sign of a bad voltage regulator. This is a unit that regulates the charging of the battery from the alternator. When this is not functioning properly, this can cause...

Q: Panel reads Engine Overheating

From the description provided on your Cadillac Deville, it appears that you may be experiencing an electrical problem. Since electrical issues can get complex and costly, I find it in your best interest to enlist the help of a certified...

Q: I got gas recently. Didn't put much in it, and it spewed back out. Does the evaporative solenoid need to replaced?

Hi, thanks for writing in. Yes, this is almost a sure sign of a failing evaporation canister solenoid. As you may know this solenoid is responsible for monitoring the fumes (and related pressure that builds) in the fuel tank. The...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.